Add writerow to write CSV format row-wise in a loop

[sairus7]

If I want to write CSV file row by row, I should wrap each row with 1-element vector (Table-compatible source) and pass into CSV.write function. Maybe there can be a simpler version of CSV.writerow function, that can take any "row-compatible" object, like struct, tuple, named tuple, and so on?

It can be needed to write CSV-formatted logs, like in this MWE:

using CSV
using HTTP
using MsgPack

struct MyMsg
    name::String
    index::Int
    number::Float64
end
MsgPack.msgpack_type(::Type{MyMsg}) = MsgPack.StructType()

@async HTTP.WebSockets.listen("127.0.0.1", UInt16(1234)) do ws

    append = false
    while !eof(ws) # even with this line there is `EOFError: read end of file``
        bytes = readavailable(ws)
        msg = unpack(bytes, MyMsg)
        println(msg)

        #I want to save msg line-by-line into CSV without storing it into a vector of total number of messages
        CSV.write("test2.csv", [msg];, delim = '\t', append = append)
        append = true
    end
end

HTTP.WebSockets.open("ws://127.0.0.1:1234/"; binary=true) do ws
    for k = 1:10
        msg = MyMsg("hello", k, randn())
        write(ws, pack(msg))
    end
end